<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>

<body>
    <script>
        const obj = { size: '40cm*40cm', color: '黑色' }


        // 40cm*40cm/黑色

        const str = Object.values(obj).join('/')
        console.log(str);

    </script>
</body>

</html>